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Array methods #192
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Array methods #192
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,10 +1,10 @@ | ||
| function camelize(str) { | ||
| return str | ||
| .split('-') // splits 'my-long-word' into array ['my', 'long', 'word'] | ||
| .split('-') // розбиваємо 'my-long-word' на масив елементів ['my', 'long', 'word'] | ||
| .map( | ||
| // capitalizes first letters of all array items except the first one | ||
| // converts ['my', 'long', 'word'] into ['my', 'Long', 'Word'] | ||
| // робимо першу літеру велику для всіх елементів масиву, крім першого | ||
| // конвертуємо ['my', 'long', 'word'] в ['my', 'Long', 'Word'] | ||
| (word, index) => index == 0 ? word : word[0].toUpperCase() + word.slice(1) | ||
| ) | ||
| .join(''); // joins ['my', 'Long', 'Word'] into 'myLongWord' | ||
| .join(''); // зʼєднуємо ['my', 'Long', 'Word'] в 'myLongWord' | ||
| } |
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,5 @@ | ||
|
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| function filterRange(arr, a, b) { | ||
| // added brackets around the expression for better readability | ||
| // навколо виразу додано дужки для кращої читабельності | ||
| return arr.filter(item => (a <= item && item <= b)); | ||
| } |
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,14 +1,14 @@ | ||
| ```js run demo | ||
| function filterRange(arr, a, b) { | ||
| // added brackets around the expression for better readability | ||
| // навколо виразу додано дужки для кращої читабельності | ||
| return arr.filter(item => (a <= item && item <= b)); | ||
| } | ||
|
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||
| let arr = [5, 3, 8, 1]; | ||
|
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| let filtered = filterRange(arr, 1, 4); | ||
|
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| alert( filtered ); // 3,1 (matching values) | ||
| alert( filtered ); // 3,1 (відфільтровані значення) | ||
|
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||
| alert( arr ); // 5,3,8,1 (not modified) | ||
| alert( arr ); // 5,3,8,1 (не змінюється) | ||
| ``` |
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,13 +1,13 @@ | ||
| ```js run | ||
|
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||
| let john = { name: "John", age: 25 }; | ||
| let pete = { name: "Pete", age: 30 }; | ||
| let mary = { name: "Mary", age: 28 }; | ||
| let ivan = { name: "Іван", age: 25 }; | ||
| let petro = { name: "Петро", age: 30 }; | ||
| let mariya = { name: "Марія", age: 28 }; | ||
|
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| let users = [ john, pete, mary ]; | ||
| let users = [ ivan, petro, mariya ]; | ||
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| let names = users.map(item => item.name); | ||
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| alert( names ); // John, Pete, Mary | ||
| alert( names ); // Іван, Петро, Марія | ||
| ``` | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,3 @@ | ||
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||
| - Please note how methods are stored. They are simply added to `this.methods` property. | ||
| - All tests and numeric conversions are done in the `calculate` method. In future it may be extended to support more complex expressions. | ||
| - Зверніть увагу, як зберігаються методи. Вони просто додаються до внутрішнього обʼєкта (`this.methods`). | ||
| - Всі тести та числові перетворення виконуються в методі `calculate`. У майбутньому він може бути розширений для підтримки складніших виразів. |
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